Can i use these with DC voltages?

These switches are rated at 5/120 and 3/240 AC , contacts are silver plated which is good for AC but not for DC since platting is so thin and contact resistance so good you will end up with weld contacts, I have been using these switches on 30 ma up to 500ma no problem what so ever

I'm not an electronics person, so I'm not sure how to read the diagram; what are each of the terminals for? How do you wire this switch into a circuit

It depends on the circuit which you will be wiring the switch into. A wire needs to be connected to the (C)ommon connection opposite of the roller. You then need to determine if you need the switch in the open or closed position when the switch is not activated. I use the common and the normally open for my CNC milling machine limit switches.

Any recomendation of spade Wire Connector for it? 3.3mm is odd size.

the connections are solder lugs, not too well suited for use with a female spade connector. The switch dimensions dictate the size of the connections, and limit them so that, when installed, the connections won't contact a mounting surface. Plus -- the nature of use, with something actuating the switch mechanically, somewhat dictates a more mechanically secure connection than you might expect with a push-on connector. If you must use one, consider a short flexible wire pigtail soldered to each terminal, then add the connector of choice to the end of that wire for your chosen connector.

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HiLetgo 10PCS Kw12-3 Ac 250V 5A Spdt 1No 1Nc Micro Limit Switch Normally Open Close Limit Switch with Roller Lever Arm Black

Product ID: 715603524

Details

Brand
HiLetgo
Connector type
Smt
Contact type
Normally Open
Operation mode
manual
Switch type
Limit Switch

⚡5A current rating

🔄SPDT 1NO 1NC dual contact

🎛️Compact 20x10.5x6.5mm size

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4042 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎯 Master your circuits with precision and power!

PRECISION MICRO CONTROL - Instant, reliable switching with roller lever arm for seamless mechanical action.
COMPACT DURABLE DESIGN - Small footprint (20x10.5x6.5mm) with IP54 protection for long-lasting performance.
DUAL CONTACT FLEXIBILITY - Normally Open and Normally Closed contacts for versatile circuit design.
ROBUST 5 A POWER HANDLING - Supports up to 250V AC and 5A current, perfect for demanding applications.
WIDE INDUSTRY APPLICATIONS - Trusted in automotive, medical, home appliances, and industrial automation.

The HiLetgo KW12-3 Micro Limit Switch is a compact, high-performance SPDT switch featuring a roller lever arm for fast, reliable mechanical actuation. Rated for 250V AC and 5A current, it offers both Normally Open and Normally Closed contacts, making it ideal for diverse applications from automotive electronics to home appliances. With IP54 protection and a small form factor, this 10-pack ensures durable, precise control in professional and industrial settings.

Specifications

ASIN	B07X142VGC
Brand Name	HiLetgo
Color	black / black
Connector Type	Smt
Contact Type	Normally Open
Customer Reviews	4.6 4.6 out of 5 stars (650)
International Protection Rating	IP54
Item Dimensions	10 x 20 x 37 centimeters
Manufacturer	HiLetgo
Material Type	Plastic
Model	3-01-1546
Mounting Type	PCB Mount
Number of Items	10
Operation Mode	manual
Switch Type	Limit Switch
Terminal	Spdt
Unit Count	10.0 Count
Wattage	1250 watts

Reviews

A**R

جيد جدا

26.10.2025

M**.

Solid little micro switches. Have stood up to time and continue to work.

15.06.2025

S**R

Worked as should. Perfect size for my application.

11.03.2026

W**E

Junk only last 20 minutes that start screwing up

21.06.2025

C**S

Working flawlessly

28.02.2026

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